I’m horrible at solving mystery/challenge caches, and I need help.

[+Team_Ducks]

The other day I was looking at a mystery cache. It involved strings of random numbers. Here it is: numbers removed by moderator 
I’m not really an experienced mystery cache solver. However, this was a 2 difficulty, but I just can’t get my mind around it. 
It’s supposed to start with N59 xx.xxx E14 yy.yyy. X and Y are the missing numbers.

 

In general I’m horrible at solving mystery caches without instructions, like, what am I supposed to do?

 

I would really like to get tips on how to solve more mystery caches in general and especially this one.

 

Thanks!

Edited February 17 by Team_Ducks
No solutions in the forums, please

[geoawareUSA9]

Please don't post in the forums looking for a puzzle solution.

 

If I am stuck on a puzzle, I usually ask the cache owner for a hint first, followed by cachers who have recently logged it.

[+niraD]

8 hours ago, Team_Ducks said:

I would really like to get tips on how to solve more mystery caches in general

Here are some general puzzle tips (based in part on a puzzle-solving class event presented by The Rat a while ago):
 
Identify the theme. Check the cache title, the hint, the HTML source, the graphics (including names/URLs), any links (including URLs), whatever is at the posted coordinates, etc. If you can figure out the theme, then you should look for numbering systems that are associated with that theme (zip codes, athletes’ jersey numbers, episode numbers, product codes, etc.).
 
Around here, coordinates will have 15 digits, and will look like "N 35° xx.xxx W 084° xx.xxx". So when I'm solving a nearby puzzle, I look for a group of 15 things, and then I look for ways to get the digits 35xxxxx084xxxxx from them. In general, I look for ways to get the number 35 (or the digits 3 and 5) from something near the beginning of the puzzle, and the number 084 (or the digits 0, 8, and 4) from something near the middle of the puzzle. (Of course, you'll need to adjust this for the coordinates near you.)
 
If you ask the cache owner for a hint, then be sure to mention the approaches you have tried so far, and the results those approaches have yielded. It can also be helpful to work together with others who are trying to solve the same puzzle. Geocaching events are a good place to meet other geocachers; ask around to see if anyone else is trying to solve the same puzzle(s) as you.
 
Other useful resources include:

• How to solve Mystery Caches (also known as Puzzle Caches) (blog post)
• Puzzle Solving 101 Series (bookmark list)
• Calgary Puzzle Solving 101 (bookmark list)
• Puzzle Shortcuts (bookmark list)
• Solving Puzzle Caches (online article)
• How Do I Solve All These &#$@! Puzzle Caches? (tutorial-style puzzle cache)
• Geocaching Toolbox ("All geocaching tools a geocacher needs in one box.")
• The GBA's Puzzle Cache FAQ (for puzzle designers, but useful for understanding how puzzle caches work)
• How to Puzzle Cache (book)

 

8 hours ago, Team_Ducks said:

and especially this one.

To expand on the response from geoawareUSA9, according to section 2.4.15 of the geocaching.com terms of use, "You agree not to: [...] Publish on our websites or anywhere else, solutions, hints, spoilers, or any hidden coordinates for any geocache or Adventure without consent from the owner."

Edited February 17 by niraD
resources accidentally truncated